Finlayson is an interesting one. He came here as a leading/opportunist forward who could ruck a bit. I think last year he showed he could really play a variety of positions. He got clearances, he is good below his knees and has good disposal. He strikes me as our new Westhoff, without the aerial skills, but more physical at ground level. Don't think he could play wing though.I'd be playing a back 6 of Jonas, Aliir, McCallum, Burton, Houston and Burgoyne and then having Houston push up into the midfield as that defensive midfielder, with Byrne-Jones coming off the bench to support Houston/Burton/Burgoyne. I'd have Bergman and Duursma on the wings folding back into defence. Not sure who I'd have as support here - Sinn would be the best choice so hopefully he's fit and firing.
In the middle I'd start with Wines, Boak and Rozee, rotating with Powell-Pepper, Horne-Francis and Butters who I'd be playing in the forward line. The other general forward spot I'd give to Rioli, with Fantasia on the bench. Key forwards would be Dixon, Marshall and Georgiades. Finlayson would be my plug and play key position utility that gives any key position player (including ruck) a rest when needed. Speaking or ruck, that goes to Lycett.
Last spot would go to Farrell.
I know a lot of people want to see him in defense but I don't think he is good enough one on one. He might be able to play as a floating tall back there which would relieve the pressure on the other tall defenders. It will be interesting to see how he is used other than as a second ruck (God forbid he is used as the main ruck).
He may end up as a permanent forward once Dixon goes.